Budgeting
Emergency fund
Also known as: rainy-day fund.
An emergency fund is a liquid cushion equal to three to six months of fixed expenses, set aside exclusively for unexpected events.
It should be available within 24-48 hours and held in a stable instrument — a savings account, short-term deposit or money-market fund — never in stocks.
Its job isn't to earn a high return; it's to stop an emergency from forcing you to sell investments at the worst time or turn to expensive credit.